69 citations · 946 across the 46 of their papers we have counts for
18 papers · 1 filter
Local Thermalization of SU(2) Lattice Gauge Fields on Quantum Computers
Jiunn-Wei Chen, Yu-Ting Chen, Ghanashyam Meher +3
We simulate the local thermalization dynamics for minimally truncated SU(2) pure gauge theory on linear plaquette chains with up to 151 plaquettes using IBM quantum computers. We s…
Entanglement Entropy of ()-Dimensional SU(2) Lattice Gauge Theory on Plaquette Chains
Lukas Ebner, Andreas Schäfer, Clemens Seidl +2
We study the entanglement entropy of Hamiltonian SU(2) lattice gauge theory in dimensions on linear plaquette chains and show that the entanglement entropies of both ground a…
Testing Eigenstate Thermalization Hypothesis for Non-Abelian Gauge Theories
Xiaojun Yao, Lukas Ebner, Berndt Müller +2
We report on progress in full quantum understanding of thermalization in non-Abelian gauge theories. Specifically, we test the eigenstate thermalization hypothesis for (2+1)-dimens…
Eigenstate Thermalization in 2+1 dimensional SU(2) Lattice Gauge Theory
Lukas Ebner, Berndt Müller, Andreas Schäfer +2
We present preliminary numerical evidence for the hypothesis that the Hamiltonian SU(2) gauge theory discretized on a lattice obeys the Eigenstate Thermalization Hypothesis (ETH).…
QPACE -- a QCD parallel computer based on Cell processors
H. Baier, H. Boettiger, M. Drochner +32
QPACE is a novel parallel computer which has been developed to be primarily used for lattice QCD simulations. The compute power is provided by the IBM PowerXCell 8i processor, an e…
Status of the QPACE Project
H. Baier, H. Boettiger, M. Drochner +27
We give an overview of the QPACE project, which is pursuing the development of a massively parallel, scalable supercomputer for LQCD. The machine is a three-dimensional torus of id…
2+1 Flavor QCD simulated in the epsilon-regime in different topological sectors
P. Hasenfratz, D. Hierl, V. Maillart +4
We generated configurations with the parametrized fixed-point Dirac operator D_{FP} on a (1.6 fm)^4 box at a lattice spacing a=0.13 fm. We compare the distributions of the three lo…
Chirally improved Dirac operators: Studying the sensitivity to topological excitations for zero and finite temperature
Christof Gattringer, Meinulf Göckeler, C. B. Lang +3
We discuss the construction and properties of an approximate solution of the Ginsparg-Wilson equation, the so-called chirally improved lattice Dirac operator. In particular we stud…
Comparing lattice Dirac operators in smooth instanton backgrounds
Christof Gattringer, Meinulf Göckeler, C. B. Lang +2
We compare the behavior of different lattice Dirac operators in gauge backgrounds which are lattice discretizations of a classical instanton. In particular we analyze the standard…
Properties of near-zero modes and chiral symmetry breaking
Christof Gattringer, Meinulf Goeckeler, P. E. L. Rakow +2
We study localization and chirality properties of eigenvectors of the lattice Dirac operator. In particular we focus on the dependence of our observables on the size of the corresp…
A comprehensive picture of topological excitations in finite temperature lattice QCD
Christof Gattringer, Meinulf Göckeler, P. E. L. Rakow +2
We study spectra, localization properties and local chirality of eigenvectors of the lattice Dirac operator. We analyze ensembles of quenched SU(3) configurations on both sides of…
Higher-twist contributions to the Structure Functions coming from 4-fermion operators
S. Capitani, M. Göckeler, R. Horsley +5
We evaluate the contribution of a class of higher-twist operators to the lowest moment of the Structure Functions, by computing appropriate matrix elements of six four-fermion oper…
Ergodic Properties of Classical SU(2) Lattice Gauge Theory
J. Bolte, B. Müller, A. Schäfer
We investigate the relationship between the Lyapunov exponents of periodic trajectories, the average and fluctuations of Lyapunov exponents of ergodic trajectories, and the ergodic…
Small eigenvalues of the SU(3) Dirac operator on the lattice and in Random Matrix Theory
M. Göckeler, H. Hehl, P. E. L. Rakow +2
We have calculated complete spectra of the staggered Dirac operator on the lattice in quenched SU(3) gauge theory for β= 5.4 and various lattice sizes. The microscopic spectral den…
Random-matrix universality in the small-eigenvalue spectrum of the lattice Dirac operator
M. E. Berbenni-Bitsch, A. D. Jackson, S. Meyer +3
We analyze complete spectra of the lattice Dirac operator in SU(2) gauge theory and demonstrate that the distribution of low-lying eigenvalues is described by random matrix theory.…
A microscopic semiclassical confining field equation for lattice gauge theory in 2+1 dimensions
Christoph Best, Andreas Schaefer
We present a semiclassical nonlinear field equation for the confining field in 2+1--dimensional lattice gauge theory (compact QED). The equation is derived directly from the…
Variational description of statistical field theories using Daubechies' wavelets
Christoph Best, Andreas Schaefer
We investigate the description of statistical field theories using Daubechies' orthonormal compact wavelets on a lattice. A simple variational approach is used to extend mean field…
Wavelets as a variational basis of the XY model
C. Best, A. Schaefer
We use Daubechies' orthonormal compact wavelets as a variational basis for the model in two and three dimensions. Assuming that the fluctuations of the wavelet coefficients ar…